A region produces the same total amount of food in two years. Its population increases by 25% between these years. Food is shared equally and none is imported.
What happens to the amount of food available per person?
It decreases by 20%20\%20%.
It decreases by 25%25\%25%.
It increases by 20%20\%20%.
It increases by 25%25\%25%.
38 exam-style questions on Edexcel GCSE Biology 9.2 Energy transfer and biodiversity, covering 9.2.1 Energy transfer between trophic levels, 9.2.2 Efficiency of energy transfers, 9.2.3 Human interactions and biodiversity, 9.2.4 Benefits of maintaining biodiversity, and 9.2.5 Biological factors affecting food security. Each one has a worked solution and a mark scheme showing where the marks go.